Question Detail
Question
How many joules are in 1 kilowatt-hour (kWh)?
Correct Answer
Option B is the correct answer.
Detailed Explanation
1 kWh is the energy transferred by a 1 kW device operating for 1 hour. 1 kW = 1000 W, 1 hour = 3600 s, so 1 kWh = 1000 W × 3600 s = 3.6 × 10⁶ J.
Hint
It's a unit of energy commonly used for electricity bills.